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glibc  2.9
td_ta_tsd_iter.c
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00001 /* Iterate over a process's thread-specific data.
00002    Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include "thread_dbP.h"
00022 #include <linuxthreads/internals.h>
00023 #include <alloca.h>
00024 
00025 td_err_e
00026 td_ta_tsd_iter (const td_thragent_t *ta, td_key_iter_f *callback,
00027               void *cbdata_p)
00028 {
00029   struct pthread_key_struct *keys;
00030   int pthread_keys_max;
00031   int cnt;
00032 
00033   LOG ("td_ta_tsd_iter");
00034 
00035   /* Test whether the TA parameter is ok.  */
00036   if (! ta_ok (ta))
00037     return TD_BADTA;
00038 
00039   pthread_keys_max = ta->pthread_keys_max;
00040   keys = (struct pthread_key_struct *) alloca (sizeof (keys[0])
00041                                           * pthread_keys_max);
00042 
00043   /* Read all the information about the keys.  */
00044   if (ps_pdread (ta->ph, ta->keys, keys,
00045                sizeof (keys[0]) * pthread_keys_max) != PS_OK)
00046        return TD_ERR;       /* XXX Other error value?  */
00047 
00048   /* Now get all descriptors, one after the other.  */
00049   for (cnt = 0; cnt < pthread_keys_max; ++cnt)
00050     if (keys[cnt].in_use
00051        /* Return with an error if the callback returns a nonzero value.  */
00052        && callback (cnt, keys[cnt].destr, cbdata_p) != 0)
00053       return TD_DBERR;
00054 
00055   return TD_OK;
00056 }